Center Line Folder Soft Seal Butterfly Valve

• Media: Water, Oil, Gas and Other Non-Causticity Medium
• Driving Mode: Manual
• Connection Form: Flange
• Structure: Centre Sealing
• Seal Form: Supercharging Pressured Sealed
• Work Pressure: Mid-Pressure (2.5mpa< Pn <6.4mpa)
• Model NO.: D371X-10/16
• Working Temperature: Normal Temperature (-40°C<T<120°C)
• Material of Seal Surface: Soft Sealed
• Valve Body: Casting
• Application: Industrial Usage, Water Industrial Usage
• Service: OEM/ODM
• Shelf Life: 18 Months
• Transport Package: Poly Bag, Inner Box, Outer Carton /and Pallet
• Specification: DN50-1200
• Trademark: DAISEN
• Origin: China
• HS Code: 8481804090
• Production Capacity: 80000t/Year

Product Description

Centerline Seal Butterfly Valve

With the disc seal center of butterfly valve and rotation center of stem overlapped,sealing load Will be produced between the sealing faces of seat and disc under certainmagnitude of interference. Thus to ensure effective seal of valve. Lined with rubber on body.This structure is applicable for me-dium and small-bore butterfly valves. Due to thedeformation under extrusion.during the process of opening and closing, disc is alwaysunder extrusion.So. the upper and lower valve shafts are seriously extruded, whichcan be bad to the service life of valve. And. the open-close moment of valve is rela-tively high. The defect is that disc and seat are always under extrusion, scra- tch, highresistance andserious adrasion. To overcome extrusion and scratch and to ensuregood seal, seat basically uses rubber or PTFE,or other elastic materials. However,temperature can be a problem. This is why butterfly valves are ,conventionally, notresistant to high temperature.

Design Standard		GB/T12238			API609,MSS SP-67
Pressure-Temperature Rating		GB/T12224			API609
Face-Face		GB/T12221			API609
Flange Ends		GB/T9113,JB/T79			ASME B16.1\B16.5\B16.47\BS4504
Inspection&Test		JB/T9092,GB/T13927			API598
Norminal Pressure(MPa)		1.0	1.6	2.0	CLASS125	CLASS150	CLASS250
(MPa) Test Pressure	Shell Test	1.5	2.4	3.0	1.55	2.94	3.11
	High Pressure Seal Test	1.1	1.76	2.2	1.13	2.16	2.28
	Low Pressure Seal Test	0.6	0.6	0.6	0.6	0.6	0.6
Applicable Temperature		-10ºC~90ºC() Different raw material for different work temperature
Applicable Medium		Water,oil,gas and other non-causticity medium(Different raw material for different medium)

No	Part Name	Materials	Opptional Materials
1	Body	Cast Iron	Ductile Iron/Carbon steel
2	Seat	NBR or EPDM	Neoprene,PTFE
3	Disc	Ductile Cast Iron	Aluminum Bronze,SS,Mnel
4	Bushing	PTFE	Luberized Bronze
5	Pin	316	Mnel
6	Stem	2Cr13	SS,Mnel

 

	φ	H1	H2	L	E	Kg
DN50	150	80	199	42	153	5
DN65	150	89	213	45	153	6
DN80	150	95	219	46	153	7
DN100	150	114	238	52	153	8
DN125	150	127	251	55	153	10
DN150	150	139	264	56	153	13
DN200	300	175	302	61	250	20
DN250	300	203	334	66	250	35
DN300	300	242	380	77	227	44
DN350	300	267	411	77	227	58
DN400	300	309	505	87	420	74
DN450	300	328	527	106	420	133
DN500	380	361	600	132	460	174
DN600	380	459	682	152	520	242
DN700	380	520	749	163	580	374
DN800	380	591	797	188	580	458
DN900	450	656	920	203	660	873
DN1000	450	721	1000	216	660	1024
DN1200	450	780	1035	254	66	1280